ACOUSTIC PROPERTIES
Alumetal u.s.a Futuristic Ceiling Systems allow for a high level of sound absorption and attenuation. Ceiling Panels are available with or without non-woven acoustic infill material bonded into them during manufacture. Infill materials are black or white non-woven acoustical tissue that produces excellent sound absorption. Alternatively, black film can be specified to reduce air movement and dust penetration through perforations. Mineral wool acoustical pads can also be supplied in a wide range of thickness and densities.

Sound Absorption
ALUMETAL U.S.A Futuristic Systems are continually tested by international independent laboratories in U.K and U.S.A for sound absorption and acoustic performance to conform to ISO 354-1985. Example: ALUMETAL U.S.A with 16% open area perforations lined with 0.05mm thick non-woven acoustic tissue.
TEST
SPECIMEN
FREQUENCY (Hz)
125
250
500
1000
2000
4000
1/3 Oct.
0.34
0.84
0.79
0.69
0.69
0.67
0.60
0.78
0.71
0.66
0.69
0.66
0.89
0.84
0.61
0.64
0.69
0.64
1/1 Oct.
0.61
0.82
0.70
0.66
0.69
0.66

Perforation Examples
2.3mm diameter hole on a 5x5mm square pitch with a 16% open area
1.8mm diameter holes on a 10x10cm diagonal design pattern with a 16% open area
2.3mm diameter holes on a 5x5cm square pitch on a designer quarter grid pattern with a 16% open area
6mm diameter holes on a 8x8cm square pitch with a 40% open area
1.8mm diameter holes on a 3.5x3.5cm square pitch with a 21% open area
1.8mm diameter holes on a 10x10cm square designer pattern giving an open area of 16%





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